Publication Date
2020
Journal or Book Title
Physical Review Research
Abstract
Coherent perfect absorption (CPA), also known as time-reversed laser, is a wave phenomenon resulting from the reciprocity of destructive interference of transmitted and reflected waves. In this work we consider quasi-one-dimensional lattice networks which posses at least one flat band and show that CPA and lasing can be induced in both linear and nonlinear regimes of this lattice by fine-tuning non-Hermitian defects (dissipative terms localized within one unit-cell). We show that local dissipations that yield CPA simultaneously yield novel dissipative compact solutions of the lattice, whose growth or decay in time can be fine-tuned via the dissipation parameter. The scheme used to numerically visualize the theoretical findings offers a novel platform for the experimental implementation of these phenomena in optical devices.
DOI
https://doi.org/10.1103/PhysRevResearch.2.013054
Volume
2
Issue
1
License
UMass Amherst Open Access Policy
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 License.
Recommended Citation
Danieli, Carlo and Thudiyangal, Mithun, "Casting dissipative compact states in coherent perfect absorbers" (2020). Physical Review Research. 1306.
https://doi.org/10.1103/PhysRevResearch.2.013054